非const左值引用不能使用右值对其赋值:
std::string& r = std::string(); //错误!std::string()产生一个临时对象,为右值
假设可以的话,就会遇到一个问题:如何修改右值的值?因为引用是可以后续被赋值的。根据上面的定义,右值连可被获取的内存地址都没有,也就谈不上对其进行赋值。
package AESUtil | |
import ( | |
"bytes" | |
"crypto/aes" | |
"crypto/cipher" | |
"fmt" | |
) | |
func PKCS5Padding(ciphertext []byte, blockSize int) []byte { |
package RSAUtil | |
import ( | |
"crypto" | |
"crypto/rand" | |
"crypto/rsa" | |
"crypto/sha256" | |
"crypto/x509" | |
"encoding/pem" | |
"errors" |
package main | |
import ( | |
"flag" | |
"fmt" | |
"log" | |
"github.com/shogo82148/androidbinary/apk" | |
) |
package main | |
import ( | |
"fmt" | |
"reflect" | |
) | |
var typeRegistry = make(map[string]reflect.Type) | |
func registerType(typedNil interface{}) { |
package main | |
import "fmt" | |
func main() { | |
// Directed Acyclic Graph | |
vertices := map[int][]int{ | |
1: []int{4}, | |
2: []int{3}, | |
3: []int{4, 5}, |
C++版本是-std=c++11
#include <iostream>
class Codinghuang
{
public:
Codinghuang()
{